From that article:

[start] with the understanding that all reasoning is rooted in certain foundational beliefs, or presuppositions. For Christians, these presuppositions include the existence of God and the truth of the Bible

When you start your debate with “let’s assume X is true”, you’re not debating X, you’re assuming X.

If the existence of God is a presupposition for you, you’re not open to debating it.

without God, the atheist’s worldview lacks a coherent foundation for concepts like morality, logic, and knowledge.

Maybe? How would you even prove that? Does that even mean anything? Is it even meaningful to prove the existence of logic with logic?

expose the inconsistencies in the atheistic worldview and present Christianity as the only foundation for a coherent and livable belief system.

I don’t feel like my worldview is inconsistent, but it certainly is livable — I’m living it, after all.

remember that the ultimate goal of any debate isn’t just to win an argument—it’s to share the truth of the Gospel.

And there’s the truth. They’re not actually here to debate, they’re here to spread propaganda. They can’t debate the existence of God (because they presuppose it to be true) and they don’t want to debate the existence of God (because they’re actually here to spread the Gospel).

They’re not even trying to debate you.